Four persons said to be Egyptians were Saturday afternoon caught secretly recording the Black Stars training session.
The session was closed to the media and to the public at some point to enable the Black Stars coach fine tune his squad for Tuesday's crucial World Cup playoffs against Egypt.
However, four persons were arrested by the security for allegedly filming the session.
The were later released, sources at the Sports Council said.
Bradley's men were also training simultaneously at the KNUST park miles away.